Secret Under the Sea

Why is his dolphin acting so strangely? Something must be wrong. It is the year 2013, and Robby lives in an Underwater Research Station with his scientist parents. Most of the time he has fun exploring the ocean caves with the dolphin who is his favorite companion. But something has frightened the dolphin, and Robby sets out to investigate. Then he finds the giant footprints. And he knows that something enormous and unknown is walking here across the bottom of the sea.

Secret under Antarctica

Dive into adventure in the last unknown territory on Earth - the sea. Join Robby Hoenig and a cast of characters as unusual as any ever met on a distant planet... In the second Robby Hoenig adventure, Secret under Antarctica, a scientific expedition becomes a race to stop a terrorist plot for world-wide disaster, buried beneath the ice of the South Pole...

Secret under the Caribbean

Dive into adventure in the last unknown territory on Earth - the sea. Join Robby Hoenig and a cast of characters as unusual as any ever met on a distant planet… In the third Robby Hoenig adventure, Secret under the Caribbean, the key to a baffling puzzle - and the truth about a mysterious monster - are locked inside a sunken Spanish ship…